Adjustable hone



J.J.PALOTSEE ADJUSTABLE BONE June 15, 1948.

3 Sheets-Sheet 1 Filed Nov. 12, 1946 N MK @N June 1948- J. J. PALOTSEE I ADJUSTABLE HONE 3 Sheets-Sheet 2 Filed Nov. 12, 1946 am mm June 15, 1948. J, J. PALOTSEE ADJUSTABLE HONE 3 Sheets-Sheet 3 Filed Nov. 12, 1946 Patented June 15, 1948 "UNITED "S'TA'TESPATENT OFFICE I. I Y ADJUSTABLETHONE A J 01111.! Palotsea'Youngstown, Ohio Application November 12, 1946, Serial No. 709,177

. 6 Claims.

This invention is a novel adjustable hone particularly adapted for use in connection with hone driving or rotating machines, preferably but not necessarily of the type shown in my U. S. Letters Patent No. 2,358,247, dated September 2, 1 44,.

the present invention being an improvement on the hone disclosed in my U. S. Letters Patent No.

2,269,378, dated January 6, 1942; No. 2,332,463, dated October 19, 1943; No. 2,338,963, dated January 11, 1944, and the-hone disclosed in copending application Serial No. 585,629, filed March 30, 1945, now Patent No. 2,412,419, dated December 10, 1946.

The principal objects of the present invention are to provide an adjustable abrasive cylindrical hone, particularly adapted for grinding, machine finishing, polishing or boring cylindrical bearings or the like, the hone consisting of a spindle carrying an annular series of radially disposed blades, each carrying a Carborundum or other abrasive stone section, the stones of the blades when fully contracted around the spindle forming a cylindrical surface having spiral grooves on the exterior surface thereof, the blades and spindle being provided with complementary tapered surfaces-with means for simultaneously shifting the blades axially of the spindle to effect expansion or'contr'action of the hone with respect to the spindle to vary the diameter thereof, and the spindle having means thereon for yieldably maintaining the blades in close contact therewith in all adjusted diameters, while permitting shifting of the blades with respect to the spindle.

' A'further object of the invention is to provide a hone of the above type with an improved novel means for'assembling and mounting the Carborundum stones on their related blades, whereby various different sets or types of Carborundum or other abrasive stones may be used with the same set of blades, to perform different kinds or grades of work.

A further object of the invention is to provide an adjustable hone comprising a plurality of sets of aligned blades on one spindle with means whereby the bones may be contracted and expanded simultaneously by a single adjusting means.

Further minor'objects of the invention will be hereinafter set forth.

- several practical embodiments thereof, to enable others familiar with the art to adopt and use the same; and will'summarize' in theiclaims the novel of parts, for which protection is desired.

. In said drawings: 1

Figures 1 and 1a together show a longitudinalsection, partly in elevation, through a hone embodying my invention. 7

Fig. 2 is an outer, end view of the hone shown inFig.1.:-@

Fig. 3 is a section on the line 3-3, Fig. 1.

Fig. 4 15a section on the line 4-4, Fig. 1, showing theblades in fully retracted position.

Fig. 5 is a. section similar to Fig. 4, showing the blades in fully expanded position. 7

.Fig. 61s aplan view of the spindle, detached.

Fig. 7 is an end view of the spindle, shown in Fig. 8 is an elevation of the spring holder shown in Fig. 1,. detached. 1

Fig. 9 is an-elevatio'n showing the spring and bolt used in connection with the holder shown in Fig. 8, detached.

Fig. 10 is a bottom plan view of one of the stone holding blades, detached.-

Fig. 11 is a longitudinal section, on the line H-i|, Fig. 10.

I Fig. '12 is an end Fig; 13 is-a bottom plan view showing the end of view of the blade shown in Fig. 14 is a longitudinal section through the end of the blade shown in Fig. 13.

Fig. 15 is a plan view of oneof the stone holders.

Fig. 16 is a section on the line 16-16, Fig. 15

Fig. 17 is similar to Fig. 16 but showing a section through a modified, stone holder.

The hone comprises a spindle l of hexagonal cross section and of relatively great length, having thereon spaced pairs of inclined cam surfaces lax-lb (Fig.6) preferably formed integrally therewith-said surfaces la, b sloping in the same direction and at the same angle with respect to the spindle], the surfaces la, lb being each disposedlatthe center ofone of the faces of the spindle I. In Figs/l and 5, the spindle I is shown hexagonal in cross-section, hence each annular series of cam surfaces la, lbwould comprise six in number; .however, if the spindle has 4, 8 or more sides. acorresponding number ofsurfaces la, lb in eachseries would be provided. Each annular series of inclined surfaces I a, lb is adapted .to support an annular series of blades, which carry the stones, there being as many annular series of blades as there are sets of cam surfaceslcflb.

Oneend -cf"sp'indle I is reduced as at lc 3 (Fig. 1a) and the adjacent end of the spindle l is threaded as at Id, said threaded portion Id being adapted to be mounted directly on the shaft of a honing machine, such as disclosed in my U. S. Letters Patent No. 2,358,247, dated September 12, 1944, although the same may be mounted in any other type of driving or rotating machine. Preferably spindle l is provided With a bore le extending therethrough, from the threaded end' id to a point adjacent the other end, at which point lateral ducts If extend from the bore l e to the exterior of the spindle and just beyond the larger end of the inclined surfaces lb of the outer series. ducts lg (Fig. 6) extend from bore is and discharge between each of the remaining sets of Also, lateral 4 relation around the spindle, while permitting enlarging and contracting of the effective diameter of the hone.

Spring 6 in collar or nut 5 is somewhat stiffer than spring 9 in spring holder &, so that as collar or nut 5 is shifted toward the head db, the pressure of the stronger spring 6 acting through the collar 3 will shift the blades 2 against the action of the weaker spring 9 this yieldably permitting the conical head 4b to be shifted a corresponding amount.

As shown in Figs. 10, 11 and 12, each blade "2 is substantially frusto-conical in cross-section,

" same having a base 21) of substantially the same cam surfaces la, lb, the duct 'le being adapted to supply lubricant from the honing machine which is discharged into the spindle beneath each set of stones 2, to lubricate the parts and to assist in the-"honing operation.

slidably' mounted upon" the reduced 'portion lc of the spindle l, adjacent the threaded portion ld, is a collar 3 (Fig. la) having aconical face so engagingthe correspondingly beveled ends 2a of the innermost set of blades 2, the conical face 311 maintaining'the adjacent ends of the blades 2 in assembled relation around the spindle. 1

Around the spindle land contacting the inner end of the'collar 3 is an anti-'friction'bearing i; and on the threaded'end Id ofspindle l is an adjusting collar or n'ut' 5 which may be of smooth bore, as at Ea, or to engage the threads Id of the spindle l. Nut 5'is provided with an annular recess 51) in its end adjacent the collar 3, saidrecess housing a spring 6. The'recess 5b is enlarged at its outer end 5c"adjacent the collar 3 to receive the end of anti-friction bearing 1. any desired means or manuallyirotated to vshift the collar 3 axially of spindle I, the means for rotating the nut forming no part of my present invention.

At the outer end of the spindle l is a twin- ,drical bore lh extending to the outer end of the spindle I, said bore receiving a tubular spring holder 4 (Fig. 8) having its inner end closed but provided with a hole 4a (Figs. .1 and 8) for the passage of a bolt 3v (Figs. 1 and 9 the head of which slidably fits the bore of the spring holder 6, said bolt 8 having its inner end threaded to en- The collar or nut 5 may be shifted by width as its related face of the polygonal spindle l, and having its outer face 20 arcuate in shape,

the sides 2d being radially cut so that when the blades 2 are fully contracted around the spindle l, as shown in Figs. 3 and 4, the sides 2d will squarely abut while the outer surfaces 20 will form a substantially cylindrical surface entirely around the spindle l concentric with the axis thereof. 1

In the base 22) of, each blade area pair of spaced inclined slots 2e, 2f respectively, the bases 1 of which are inclined at the same angle to the axis of the spindle l as the inclined cam surfaces la, lb of the spindle. The slots 2e slidably engage the cam surfaces in of the spindle while the slots 2] engage the inclined cam surfaces lb of'the related set on the spindle l, as indicated in Figs. land lot, so that, as the assembly of blades 2 is shifted axially of the spindle, the

effective diameter of the hone will be increased or decreased according to the direction of movement of the blades. Preferably the bases of the slots 2e, 2 are flat, while the outer faces of the -inclined surfaces la, lb may be arcuate, the latter giving the hone smoother operation. However, the outer ends of the inclined cam surfaces la,

. lb may if desired be'also-flat.

The inner end of the outermost set of blades 2 opposite'from the inclinedend 2b has an extension 291, as shown in Figs. '1, l0 and 11, the outer face of which has a semi-circular groove 2h for the reception of an endless coiled spring Ill seating in the groove 2h; the spring it contracting the adjacent ends of the series of blade Y 2 around the spindle l, whilepermitting expansion and contraction of the effective diameter of the hone. Both ends of. the intermediate blades 2 would be similarly provided with extengage a tapped, enlargement l 7' of v the lubricant bore le ofv the spindle I the bolt 8. closing the bore le beyond the lateral duct l7. Withinthe spring .holder 4, interposed between the inner end thereof. and the head of bolt, 8 is a. spring 9 (FigsQJ. and 9) normally urging the spring holder 4, inwardlypf the borelhinto the position shown .in Fig. 1, lthe spring' howeven permitting the spring holder 4 to slideoutwardly ofbore in for .the purpose hereinafter described. The vouter end of sleevefl .bey mdi th e adjacent end of, the

spindle .l is provided with a conically shaped head 4b. similar .to' but oppositely. inclined with respect to the conicalrecess 3a,,lof collar 3, said c a .412. e n ho der. ng

the adjacent tapered' ends 2b of theoutermost set,of blades}, as shown in Fig. 1.

"wa'rdly on the cam surfaces la, l b; th e conical rt ns 3. endfib o p z ar .3 nd ri eh l 4, rspctivelyjholding the blades 2 in assembled sions 2g with grooves 2h for the reception of similar endless springs .45. The inner ends of the inner most series of blades 2 adjacent .the

collar '3 would be similarly" constructed to receive an endless spring ill for contracting the ends of thatset of blades around the spindle l. I J y In event the'hone spindlel' is relatively short,

' and holds only one set of blades 2, insteadof the multiple sets shown, the extensions 29 of the blades shown in Figs. 1 0 and ll would be omitted and both ends of the blades would be 7 beveled as at 2a:(Fi'gs. 1 3 and 14 the bevel corresponding with the conical portions 2b and 2arespectivel of the blades shown in Figs. "1, 10, "and 11.

In the outer face of each blade 2 are aser'ies 'of tapped bores 2k (Fig. 1D having their outer ends countersunk as at 211i whereby-the'stone holders ll shown more particularly in Figs; 15,

. l6 and 17 may be secured to the blades 2.

Each stone holder I l, shown in Figs. l5 and 16, comprises a metallic strip of arcuate shape conforming with the eurvatureof the outer face 20 of the respectivebladesi, the side edges'of the holder I I being flanged downwardly as at Ila, if desired, to enter correspondingly shaped recesses in the sides of their respective blades 2, as indicated in Figs. 3, 4 and 5. Holders I I are also provided with conical offset portions IIb (Fig. 16) adapted to fill the countersunk portions 2m of the blades (Fig. 11), the offset portions I It having holes IIc therethrough for the passage of the screws II. which secure the holders II to the blades 2. A modified structure of the stone holder II is shown in Fig. 17, in which reference numerals denote similar parts. However, the flanges I I a at the sides are omitted, and extending longitudinally of the holder I I at each side of the offset portions II c are troughs Ila: to assist in retaining the stone I8 on the holder, the stones having openings I 3a therein opposite each of the screws I2 which hold the holders on the blades 2. The stones I3 may be secured to the outer surfaces of holders II in any desired manner to form an integral unit therewith, preferably by means of cement or other adhesive.

By the above construction difierent sets of stones I 8, mounted in their holders II may be used with the same set of blades 2, to provide a hone for performing different characters of work, the stones I3 with their holders II being readily removable or attachable to the blades 2 by in serting or removing the screws l2.

In operation Movement of the blades 2 axially of the spindle I by shifting the nut 5 causes the blades 2 to move away from or towards the center of the spindle I, thus increasing or decreasing the diameter of the hone. This movement is the result of a thrust against collar 5, the spring 6 in the collar or nut 5 actin against the anti-friction bearing I. The shifting of collar 5 may be performed electrically, hydraulically, manually or by any other suitable means.

Spiral grooves I3b are cut in the stone I3 to facilitate cutting, said grooves permitting cuttings and cutting fluid to pass away. The direction of the spiral grooves is preferably'reversed on adjacent stones to improve cutting.

The length of the bone will determine the number of sets of blades 2 and the diameter of the hone will determine the number of blades in each set. Instead of bein ormed conical, the head 41) and the recess 3a in collar 3, and the ends of the blades to, 2b may be formed as frustrums of a pyramid.

I do not limit my invention to the exact forms shown in the drawings, for obviously changes may be made therein within the scope of the claims.

I claim:

1. An adjustable hone, comprising a spindle of polygonal cross-section; spaced annular series of aligned pairs of inclined cam surfaces on the spindle, the pairs being disposed on the faces of the spindle respectively, and the surfaces all sloping in the same direction at the same angle to the axis of the spindle; sets of blades around the spindle seating upon the respective series of cam surfaces and having aligned pairs of inclined recesses in their inner faces conforming with and engaging their related cam surfaces, means for yielda'bly maintaining the outer ends of the outermost sets of blades in assembled relation around the spindle; means for yieldably maintaining the inner ends of the outermost sets of blades and both ends of the intermediate sets of blades in assembled relation around the spindle; means for shifting the sets of blades axially of the spindle to vary the diameter of the sets of blades; stone holders removably mounted on the blades of each set; and stones carried by the respective holders- 2. In a hone as set forth in claim 1, a lubricant bore extending into said spindle from one end thereof and having lateral ports discharging into each set of blades.

3. In a hone as set forth in claim 1, said maintaining means for the inner ends of the outermost sets of blades and for the intermediate sets of blades comprising arcuate extensions on the ends of the blades provided with semi-circular grooves; and endless springs around the extensions at the end of each set seating in said grooves.

4. An adjustable hone, comprising a spindle of polygonal cross section having a bore at one end, and having its opposite end externally threaded; spaced annular series of aligned pairs of inclined cam surfaces on the spindle, the pairs being disposed centrally of the faces of the spindle respectively, and the surfaces all sloping in the same direction at the same angle to the axis of the spindle; sets of blades around the spindle seating upon the respective series of cam surfaces and having aligned pairs of inclined recesses in their inner faces corresponding with and engaging their related cam surfaces, the outer ends of the outermost sets of blades of the sets being beveled; means for yieldably maintaining the inner ends of the outermost sets of blades and both ends of the intermediate sets of blades in assembled relation around the spindle; a holder slidably mounted in said borei means yieldably urging the holder inwardly of the bore; a conical head on the outer end of the holder beyond the end of the spindle engaging the beveled ends of the adjacent outermost set of blades; a slidable collar on the other end of the spindle having a conical recess engaging the beveled ends of the other outermost set of blades; stone holders removably mounted on the blades of each set; and, stone carried by the respective holders.

5. In a hone as set forth in claim 4, a lubricant bore extending into said spindle from one end thereof and having lateral ports discharging into each set of blades.

6. In a hone as set forth in claim 1, said yieldable maintaining means comprising arcuate extensions on the adjacent ends of the blades of adjacent sets provided with semi-circular grooves; and endless springs around the extensions seating in said grooves.

JOHN J. PALOTSEE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,755,965 Omey Apr. 22, 1930 1,821,518 Jeschke Sept. 1, 1931 1,908,218 Calvert May 9, 1933 2,331,523 Wacker Oct. 12, 1943 2,412,419 Palotsee Dec. 10, 1946 2,422,434 Palotsee June 17, 1947 

